Exactly. At some point, someone somewhere will have a bad day / sneeze on a keyboard at just the perfectly wrong time -- at Google's scale, that's statistically

Exactly. At some point, someone somewhere will have a bad day / sneeze on a keyboard at just the perfectly wrong time -- at Google's scale, that's statistically a daily (hourly?) occurrence. Quota systems for the win -- if only as a shared agreement on who can do how much damage / take how much resources before they're automatically stopped and more resources must be justified through some review process (likely involving budgetary concerns).